	let backg = query('.background')
		let flit = localStorage.getItem("blur")||5;
		
		// 获取滑动选择器实例
		const sliderEl = document.querySelector(
		  "#slider-input"
		);
		// 获取数值显示容器实例
		const selectedEl = document.querySelector(
		  ".selected"
		);
		
		selectedEl.innerHTML = flit;
		backg.style.filter='blur('+flit+'px)'
		
		// 监听滑动事件
		sliderEl.addEventListener("input", () => {
		  selectedEl.innerHTML = sliderEl.value;
			localStorage.setItem("blur", sliderEl.value)
			backg.style.filter='blur('+sliderEl.value+'px)'
		});